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31focal length — n technical the distance between the centre of a lens and the focal point …
32focal length — noun count SCIENCE the distance from the center of a LENS or mirror to its focal point …
33Расстояние Фокальное Глаза (Focal Distance) — расстояние между хрусталиком и точкой позади хрусталика, в которой сходятся лучи света при рассмотрении отдаленного предмета. У человека с хорошим зрением эта точка находится на сетчатке глаза; у людей, страдающих миопией (близорукостью), она… …
34focal length — distance from the center of a lens to the point of focus …
35Distance focale — « Focale » redirige ici. Pour les autres significations, voir Focale (homonymie). La distance focale d un système optique est la mesure de sa puissance de convergence (focus) ou divergence (diffusion) de la lumière. Un système avec une… …
36Focal-plane shutter — In camera design, a focal plane shutter is a type of photographic shutter that is positioned immediately in front of the focal plane of the camera, that is, right in front of the photographic film or image sensor. AdvantagesOne of the main… …
37Distance focale équivalente en 35 mm — En photographie, la distance focale équivalente en 35 mm est une mesure qui indique l angle de vue d une combinaison particulière d un objectif d appareil photo avec une taille de film ou de capteur. Le terme provient de l époque où la… …
38focal length — F/A/V abbreviated as FL, it is the distance, in millimeters, between the center of a lens and the point where the image comes into focus. The value given to a lens, stated in inches or millimeters. The shorter the focal length, the wider the… …
39Focal mechanism — The focal mechanism of an earthquake describes the inelastic deformation in the source region that generates the seismic waves. In the case of a fault related event it refers to the orientation of the fault plane that slipped and the slip vector… …
40Focal point — A focal point may mean: * Focus (optics), the point at which initially collimated rays of light meet after passing through a convex lens, or reflecting off of a concave mirror. * In mathematics: ** Focus (geometry), a special point used in… …
